Geometry (Sine and Cosine rules) Ultimate revision guide for Further maths GCSE

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Ultimate Guide to Further maths GCSE Geometry (Sine and Cosine rules) (level 2 Qualification from AQA)
3. Coordinate Geometry
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QPR should be 55.7 for Q1 because PQR is 100.3 since it's obtuse

alexreid
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Yo dude! Have an exam tommorrow and just recapping the spec right now. But i knoticed that in the last question: in the final calculation you did, you made a mistake when rationalising. Its supposed to be Root(6) over 2. I dunno how to type maths lol. Thanks again mate.

michaelhaddadin
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for question 1, why is 'angle PQR obtuse' despite being < 90? Thanks

milohuss